And so far, he has, at least in terms of volume — especially on the interior.

Douglas on Saturday signed his fifth offensive lineman of this free agency cycle — Panthers offensive guard Greg Van Roten, who could replace right guard Brian Winters, if the Jets opt to cut him (and it would be easy).

Of the five outside free agents signed by Douglas this offseason, four are offensive linemen. Douglas also added left tackle George Fant and center Connor McGovern. Like Van Roten, they figure to be starters in 2020, though Douglas could draft a tackle at No. 11 next month.

For now, the 2020 Jets line looks like this: Fant at left tackle, Lewis or Van Roten at left guard, McGovern at center, Winters or Van Roten at right tackle, and Chuma Edoga at right tackle.

The Jets do now have some interior line options. Lewis would be a fine enough swing backup at guard. Jonotthan Harrison is a solid No. 2 center. Andrews can provide interior depth, too. Van Roten and Winters are both fairly established starting guards, though Winters might be gone.

But what about tackle? Do the Jets really want to enter 2020 with Fant and Edoga — both unproven — as the bookends for Sam Darnold’s offensive line?

That’s why the 11th overall pick is still worth watching, in terms of the Jets adding tackle help — like Mekhi Becton, Andrew Thomas, Tristan Wirfs, or Jedrick Wills. It depends on who is available, of course.

The Jets last season ranked 28th in the NFL in pass blocking and 30th in run blocking, according to Pro Football Focus’ ratings. So Douglas is doing the right thing by attacking this area of need. But he still doesn’t have an elite tackle on his roster.

Again, the draft is a perfectly acceptable place for a team to get one of those — as the Jets did in 2006, with D’Brickashaw Ferguson at No. 4.

Unlike Fant, McGovern and Van Roten were full-time starters last season. So they’re the two most prominent line additions so far this offseason, even if Fant projects as a starter (for now).

How did PFF rate McGovern and Van Roten last season? Let’s take a look ...

So these are two very solid — albeit not-quite-sexy — additions to the interior of the Jets’ offensive line. This stuff matters, even if most fans haven’t heard of these guys. The Jets simply have to get a better push for running back Le’Veon Bell than they did in 2019.

Yet uncertainty at tackle remains. Fant is not a proven starter. Edoga had a rocky rookie season in 2019. Maybe the Jets draft a tackle and let him compete with Edoga, to perhaps win the right tackle job in 2020, with an eye on the draft pick becoming the left tackle in 2021.

But Douglas is chipping away, at least, and trying to give Darnold some help. It’s a start.